Leaf anatomy of petunia in relation to pollution damage. [Using diaminozide or benomyl treatments to protect petunias from air pollution]
Anatomical observations were made on 2 petunia cultivars of Petunia hybrida Vilm., one ozone and sulfur dioxide susceptible and the other moderately tolerant with leaf cross and paradermal sections made from collections taken 4 hours to 30 days following fumigation. Disintegration of the circular chloroplast bodies into one homogeneous mass was the first visible symptom of internal cell damage. Initially, O/sub 3/ affected chloroplasts in palisade cells while SO/sub 2/ affected chloroplasts in spongy cells. Plasmolysis, aggregation of cytoplasmic contents, and disintegration of nuclei occurred. Damage from SO/sub 2/ produced more rapidly and was more extensive than that from O/sub 3/; all cell components were destroyed over larger areas. Foliar sprays of succinic acid-2,2-dimethyl-hydrazide (daminozide) or benomyl soil drenches were applied 1 week before fumigation. Microscopic observations indicated that mesophyll tissue in both daminozide and benomyl treatments resembled to some degree the compact tissue typical of young, insensitive leaves.
- Research Organization:
- Dept. of Agriculture, Beltsville, MD
- OSTI ID:
- 5196458
- Journal Information:
- J. Am. Soc. Hortic. Sci.; (United States), Journal Name: J. Am. Soc. Hortic. Sci.; (United States) Vol. 103:1; ISSN JOSHB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION
ANATOMY
BIOLOGICAL EFFECTS
CELL CONSTITUENTS
CHALCOGENIDES
CHLOROPLASTS
DATA
EXPERIMENTAL DATA
FEDERAL REGION III
FUNGICIDES
INFORMATION
LEAVES
MARYLAND
MORPHOLOGICAL CHANGES
NORTH AMERICA
NUMERICAL DATA
OPENINGS
OXIDES
OXYGEN COMPOUNDS
OZONE
PESTICIDES
PLANTS
POLLUTION
SENSITIVITY
SOLANUM
STOMATA
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
ULTRASTRUCTURAL CHANGES
USA